Turn on the M1 mini. It should automatically detect the firmware file and display a "Firmware Upgrade" message.
: If the projector doesn't recognize your USB, double-check that it is specifically in FAT32 format , not NTFS or exFAT.
To keep your projector running smoothly and to access the latest features, it's essential to keep its firmware updated. The update process varies slightly depending on whether you have the standard M1 mini or the M1 mini Plus . ViewSonic M1 mini Firmware Update Guide